Two-needle sewing-machine.



No. 763,497 PATENTED JUNE 28,1904. W. A. MACK.

TWO-NEEDLB SEWING MACHINE.

APPLICATION FILED AUG. 24,1896.'

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No. 763,497. PATENTBD JUNE 28, 1904. W. A. MACK. TWO-NEEDLE SEWING MACHINE.

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P'ATENTED JUNE 28, 1904.

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. INVENTOR a; ATTORNEY\ W. A. MACK.

TWO-NEEDLE SEWING MACHINE.

APPLICATION FILED AUG. 24,1896.

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WITNESSES:

No. 763,497. I PATENTBD JUNE 28, 1904. W. A. MACK.

TWO-NEEDLE SEWING MACHINE.

APPLIOATION FILED AUG. 24,1896.

N0 MODEL. 4 SHEBT8-SHEET 4.

WITNESSES: I INVENTOR VWH-V QHWQ.

UNITED STATES Patented June 28, 1904.

PATENT OFFICE.

WILLIAM A; MACK, OF CLEVELAND, OHIO, ASSIGNOR TO THE STANDARD SEWING MACHINE COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

TWO-NEEDLE SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 763,497, dated June 28, 1904. Application filed August 24, 1896. Serial No. 603,670. (No model-l To all whom it pea/y concern.-

Be it known that I, WILLIAM A. MACK, a citizen of the United States, and a resident of Cleveland, Cuyahoga county, and State of Ohio, have invented certain new and useful Improvements in Sewing-Machines, of which the following description, taken in connection with the drawings herewith accompanying, is

a specification.

My invention relates to sewing-machines, and particularly to that class of machines containing two shuttles or loopers and two needles, which operate conjointly to form two parallel rows of stitching.

The object of my present invention is to provide an improved machine of this class in which the second shuttle or looper and its immediate operating mechanism may be supported by a frame or casing independent of the regular shuttle and its operating mechanism and in operative connection therewith and in this frame or casing be adjustably supported relative to the regular shuttle, whereby the space between the scams or rows of stitch- .ing may be varied and also be movable from sewing position, whereby both shuttles may be rendered readily accessible for removal or other attention, the latter operation being performed without disturbing the connection between the respective shuttle-drivers, such as would interfere with the relative timing of the parts. This object I secure by means of the construction and arrangement of parts forming my invention, as hereinafter set forth in detail, and pointed out in the claims.

Referring to the drawings, Figure 1 represents a plan view of' a portion of the shuttle mechanism of a machine embodying my invention with the outline of the bed plate shown in dotted lines. Fig. 2 represents a bottom View of the front end of the machine. Fig. 3 represents an end view of the same looking toward the right in Fig. 2, also showing in dotted lines the position of the shuttlesupporting frame or casing when in a lowered position to render the two shuttles accessible. Fig. 4 represents an end view of the same with the shuttle supporting frame partly broken away and in a lowered position, also showing the exposed face of the regular shuttle; and Fig. 5 represents a detail view of a part, partly in section, to be hereinafter replate and be operated from the upper driving shaft through the medium of suitable connecting means, (not herein shown;) 6, the rotating shuttle, which is supported to operate in a suitable raceway frame or casement Z2 on the under side of the bed-plate; 6 the shuttle-driver, which is pivotally connected with the driving-shaft b and provided with pivoted arms 12* 6* for alternately engaging with the shuttle in openings therein for operating the same, and 0 a stationary cam for engaging with said shuttle-driver to cause the arms thereof to alternately engage with and withdraw from the said shuttle to provide for the passage of the thread-loop around the same in a manner as well understood by those skilled in the art. r

The above parts are of usual construction and operation as found in the Standard sewing-machine.

According to my invention as herein illustrated I have provided a frame or casing 01 for supporting the second shuttle and its driver, which said frame is movably supported in connection with the bed-plate of the machine in a manner so as to be horizontally adjustable inorder to vary the'space between the two shuttles, and thereby the distance between the rows of stitching, and also be movable in a vertical plane, whereby the shuttle supported thereby may be lowered, as shown in Fig. 4, from its operative sewing position in the same horizontal plane with the regular shuttle, and thereby expose both of the shuttles and render the same readily accessible, as will be more fully explained in detail hereinafter. This said frame (Z, as herein shown, is

made of one integral piece or casting formed to provide a chamber or receptacle 1n whloh the said second shuttle and its adjacent driving mechanism are supported and contained in a manner as follows: In that side of the frame (Z adjacent to the regular shuttle b,

as more clearly shown in Fig. 1, is secured a a short rotating shaft 6 supported in aline- V ment with the shaft Z) in suitable bearings (Z and (Z in the frame (Z, a shuttle-drii' er e pivotally connected with the shaft (3 and a stationary cam e for engaging with the shuttledriver to cause the arms thereof to alternately engage and withdraw from the shuttle The stationary cam 0 in this instance is secured upon a flange-sleeve (Z projecting from the bearing (Z The frame (Z, with the several parts supported thereby, as described, has a hinged connection adjacent to one end thereof upon a rigidly-supported stem or sleeve it, which is connected with a hanger or lug on the under side of the bed-plate, and also upon one end of a shaft f, which is supported in suitable bearings on the under side of the bedplate with one end extending through said sleeve ll and forming a bearing for one side of the frame (Z. Th'is hinged connection of the frame (Z allows that end thereof which supports the shuttle e to be lowered, as shown in Fig. 4 and in dotted lines in Fig, 5, and thereby leave the regular shuttle b exposed, whereby the same'may be readily accessible for removal or other attention, and at the same time moves the second shuttle to a position where it may be readily accessible from the inner side of the frame (Z, as will be readily understood. The frame (Z is movably supported in its normal raised position, as shown in Figs. 1, 2, and 3, with its supported shuttle e in sewing position in the same horizontal plane with the regular shuttle b by means of a suitable catch device g, which engages with a holding plate or projection on the under side of the bed-plate, as more clearly shown in Fig. 3 and as will hereinafter be more fully described.

The driving-shaft of the second shuttle e is adapted to be operated from the driving- .shaft 6 of the regular shuttle 6 through the medium of suitable mechanism to insure the proper timing of the shuttles, which mechanism, as herein shown, consists of the said shaft f, which receives motion from the shaft Z) through the medium of gears f and 7), secured upon said shafts, as shown in Fig. 2, and transmits its movement thus received to the shaft 0 of the second shuttle through the medium of gears f and as more clearly shown in Fig. 1. This described construction forms a simple and desirable means for securing an operative connection between the driving-shafts of the two shuttles, whereby the latter are operated in unison with each other. Other suitable means may be employedfor securing such connection, if so desired, without departure from my invention.

By means of the above-described operative connection between the slmttle-drivers the frame (Z may be moved or swung to carry the supported shuttle to and from its operative sewing position, as described, without disturbing the connection between the parts, and thereby enabling the relative timing of the shuttles to be maintained. This feature will be readily understood upon reference to Fig. 4, where it will be seen that as the frame (Z is lowered the gear on the shuttle-shaft turns or keeps in' mesh with the gear f on the shaft f, and so keeps the proper connection between the parts whatever the position of the frame (Z.

The frame (Z, with its several supported parts, is supported in a horizontally-adjustable position, whereby the shuttle a, supported thereby, may be adjustable in a direction toward and away from the regular shuttle b, so as to vary the space between the same, and

, thereby the space between the rows of stitching, in a manner as follows: The said stem or sleeve/t, with which the frame (Z has a hinged connection, as before stated, is rigidly and detachably connected with the hanger. on the bed-plate by extending through an opening' therein and having a fixed rib'or collar h thereon for engaging with one side of said hanger and a screw-nut Z0 for engaging and clamping with the opposite side of the latter. Any other suitable means may be employed, however, for securing the SlGBVG/L in connection with the bed-plate or the hanger (fthereon. Upon this sleeve Zt is located a second sleeve if, having an externally-screw-threaded surface, as shown, which is supported to turn upon said sleeve 71 but is held from endwise movement thereon between the collar it and a detachable collar 7L", located upon said sleeve '/L. The frame (Z is provided with a screw-threaded opening in that wall through which the sleeve k extends for coacting with the threaded surface of the latter, whereby the operator by'turning or rotating the lon gitudinally-stationary sleeve 75 by means of a raised rib it" thereon will thereby cause the frame (Z to be moved back and forth thereon, and so adjust the position of the shuttle 6, carried thereby, in its relation to the regular shuttle b. The frame (Z is locked in a stationary position relative to the sleeve 7L3 after being adjusted by means of a lock or jamnut it, located upon said sleeve if, which is adapted to be moved into close engagement with the adjacent side of the frame (Z to lock the latter in connection with the said sleeve Z0 The sleeve a being loose upon the shaft f, as described, moves freely with the frame (Z when the latter is moved in the arc of a cir cle to carry the supported shuttle to and from its operative sewing position.

By means of the construction and arrangement of parts above described and as illustrated it will be readily understood that by removing the fastening screw-nut which holds the sleeve 72. in connection with the hanger said sleeve Zr, with the connected frame (Z and its several supported parts, may be removed from connection with the shaftf and from the machine itself. The advantage of this construction is very important in that it enables the constructor to lit up the second shuttle and its immediate operating mechanism separate and independent of themachine, and also by reason of its being capable of so ready attachment with and detachment from the machine it enables the latter to be readily adapted for use either as a single ortwo shuttle sewing-machine.

The frame (Z, as herein illustrated, is so formed as to provide a substantially inclosed chamber or receptacle in which the contained parts are protected from dust or other injury. The upper part of said frame is partially closed when in its raised normal position by the work-plate of the machine, as shown by the dotted outline of the same in Fig. 1; but in order that the said second shuttle and its driver may be readily accessible from the work-plate of the machine without lowering the said frame I have cut a portion of the bed-plate away and secured a detachable plate cZ" upon said frame, which is movable with the latter, but is arranged to occupy the space left by the cut-away portion of the bed-plate when the frame is raised. By this arrangement both of the shuttles and their adjacent operating mechanism'may be exposed, if so desired, for any purpose by removing the said plate (Z and the ordinary throat-plate (Z 1' the outlines of which plates are shown in Fig; 1.-

The catch for holding'the frame (Z, with its supported shuttle, in operative sewing. position (JO11S1StS, as herein illustrated and as more clearly shown in Fig. 4, of a bar g which is supported to. slide in a suitable seat or opening in the frame (Z and is yieldingly held in anormal position by means of a spring acting against the inner end of the same, with one end thereof projecting from the side of the frame (Z in a position to engage with the holding plate or projection g, secured to the under side of the bed-plate (Z. The catch 7, as shown, is provided with an arm 9 which projects therefrom through an opening in the wall of the frame (Z at apoint below the catch 9 and in a position to be conveniently reached by the operator, which arm on its said projecting end is provided with a knob g as a convenient means by which the operator may push the catch 1 inwardly to release the same from engagement with the holding-plate g when it is desired to lower said frame (Z for the pur pose before described. The upper surface of the projecting end of the catch g is beveled, as at g in order that the catch may be moved back by the engagement therewith of the holding-plate g, so asto'slip past the latter when the frame (Z is moved up to its normal position, as will be readily understood. Any suitable device other than the catch 9 may be employed for movably holding the frame (Z in its raised position without departure from my invention, that shown being a simple and effective device for the purpose.

The frame (Z on that side thereof opposite the catch 9 is cut away, as more clearly shown in Figs. 3 and 4:, so as to allow for'the downward movement of the frame (Z to the desired position for exposing both of the shuttles,.

and the said frame at the lower edge of its cut-away portion at (Z forms a stop for en-' gaging with the under side of the bed-plate,

as shown, so as to limit the downward move the form of an inclo sing casing, as shown, and which I consider the preferred form, mayconsist of any suitable form of framearranged to support the shuttle and several other. parts, as described, or the frame (Z might .be otherwise supported than in the particular manner shown, or other means be employed to adjustv the frame (Z, with its several supported parts. These and other like changes might be employed Without departure from my invention as pointedout in the accompanying claims- WVhat I claim asnew, and desire tosecure;

by Letters Patent of the United States, is

'1. In a sewing-machine, the combination,

with a shuttle, of a second shuttle, and a hinged.

frame supporting and carrying said second. shuttle whereby the latter may be moved toand from its operative position relative to the first shuttle, an actuating means forming an operative connection between said shuttles and disposed so as to maintain such connection during the movement of the second shuttle to and from its operative position, for the purpose set forth.

2. In a sewing-machine, the combination, with a shuttle and its driver, of a second shuttle and its driver, a hinged frame supporting whereby the same may be moved to and from an operative position relative to the first shuttle, and actuating means forming an operative connection between said shuttle-drivers and disposed so as to maintain such connection during the movement of the second shuttle to v and carrying said second shuttle and driver and from its operative position, for the purpose set forth.

3. In a sewing-machine, the combination, with a stationary raceway-frame and a rotary shuttle supported therein, of a second racewayframe havinga rotary shuttle supported therein, a hinged frame supporting and carrying said second raceway-frame and its supported shuttle whereby the latter may be moved to and from an operative position relative to the first shuttle, the axis of said hinged frame being substantially parallel with the axis of the shuttles, and actuating means forming an operative connection between said shuttles and disposed so as to maintain such connection during the movement of the second shuttle to and from its operative position.

4. In a sewing-machine, the combination, with a shuttle and its driver, of a second shuttle and its driver, a hinged frame supporting and carrying said second shuttle and driver whereby the same may be moved to and from an operative position relative to the first shuttle, means for adjusting said frame to move the supported shuttle in a direction either to- Ward or away from the opposite shuttle, and actuating means forming an operativeconnection between the shuttles and maintaining such connection when the second shuttle is swung to and from its operative position.

5. In a sewing-machine, the combination, with a shuttle and its driver-shaft, of a second shuttle and its driver-shaft, a hinged frame supporting and carrying said second shuttle and driver-shaft whereby the same may be moved to and from an operative position relative to the'first shuttle, and a counter-shaft having a gear connection with each of the driver shafts and disposed so as to maintain its operative connection between the same when the hinged frame is operated to move the shuttle carried thereby to and from its operative position.

6. In a sewing-machine, the combination, with a shuttle and its driver, of a second shuttle and its driver, a hinged frame supporting said second shuttle and driver, a longitudinally stationary threaded sleeve engaging with said frame to move the same and adjust the position of the shuttle supported thereby relative to the first shuttle, means for securing said sleeve in fixed connection with the frame whereby itwill move with the latter when swung upon its hinge, and means for operat ing said shuttle-drivers, for the purpose set forth.

7. In a sewing-machine, the combination, with a shuttle and its driver, of a second shuttle and its driver, a hinged frame supporting said second shuttle and driver, a fixed stem or support upon which said frame hinges, a longitudinally-stationary sleeve supported to turn upon said stem or support and having an eXteriorly-threaded surface for engaging with said frame to adjust the position of the same with its supported shuttle relative to the first shuttle, and actuating means forming'an operative connection between the shuttles and disposed so as to maintain such connection when the frame is swung upon its hinge.

8. In a sewing-machine, the combination, with a shuttle and its driver, of a second shuttle and its driver, a hinged frame supporting said second shuttle and driver, a fixed stem or support upon which said frame hinges, a longitudinally-stationary threaded sleeve loosely supported to turn upon said stem or support and engaging with the frame to adjust the position of the same, and means for securing said frame in fixed adjusted connection with said sleeve, for the purpose setforth.

9. In a sewing-machine, the combination, with a shuttle, of a second shuttle, a hinged frame supporting and carrying said second shuttle whereby the latter may be moved to and from an operative position relative to the first shuttle, actuating means forming an operative connection between said shuttles and disposed so as to maintain such connection during the movement of the second shuttle to and from its operative position, and a device connecting with said hinged frame to support and adjust the same and having means for detachable connection with the bed-plate of the machine or part thereof, for the purpose set forth.

10. In a sewing-machine, the combination with a shuttle and its driver, of a second shuttle and its driver, a hinged frame supporting said second shuttle and driver having a catch device for engaging with a holding plate or projection for movably holding the frame with its supported shuttle in operative sewing position, the axis of said hinged frame being parallel with the axis of the shuttle-drivers, and a counter-shaft having a gear connection with said shuttle-drivers and disposed so as to maintain an operative connection between the same as the second shuttle is swung to and from operative position in its hinged supporting-frame, for the purpose set forth.

WILLIAM A. MACK.

Witnesses:

Cross. 0. EMMoNs, GEO. P. SMITH. 

